ArticleHuman brain mapping2024
Chronic cannabis use alters the spontaneous and oscillatory gamma dynamics serving cognitive control.
Article in Human brain mapping, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Neurochemical changes in GABA+, Glx, and the excitatory/inhibitory ratio in the calcarine cortex with healthy aging.NeuroImage · 2025Article
- Regular cannabis use modulates gamma functional connectivity with V1 during visual processing.NeuroImage · 2025Article
- Motor-Related Neural Dynamics are Modulated by Regular Cannabis Use Among People with HIV.Journal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology · 2025Article
- Altered Functional Connectivity Dynamics Serving Cognitive Flexibility in Regular Cannabis Users.Addiction biology · 2025Article
- Chronic cannabis use differentially modulates neural oscillations serving the manipulate versus maintain components of working memory processing.Neurobiology of disease · 2025Article
- Cannabis- and HIV-related perturbations to the cortical gamma dynamics supporting inhibitory processing.Brain communications · 2025Article
- Regular cannabis use modulates gamma activity in brain regions serving motor control.Journal of psychopharmacology (Oxford, England) · 2024Article
- People with HIV exhibit spectrally distinct patterns of rhythmic cortical activity serving cognitive flexibility.Neurobiology of disease · 2024Article
- Chronic cannabis use alters the spontaneous and oscillatory gamma dynamics serving cognitive control.Human brain mapping · 2024Article
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Authors and funding
10 authors.
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Abstract
Regular cannabis use is associated with cortex-wide changes in spontaneous and oscillatory activity, although the functional significance of such changes remains unclear. We hypothesized that regular cannabis use would suppress spontaneous gamma activity in regions serving cognitive control and scale with task performance. Participants (34 cannabis users, 33 nonusers) underwent an interview regarding their substance use history and completed the Eriksen flanker task during magnetoencephalography (MEG). MEG data were imaged in the time-frequency domain and virtual sensors were extracted from the peak voxels of the grand-averaged oscillatory interference maps to quantify spontaneous gamma activity during the pre-stimulus baseline period. We then assessed group-level differences in spontaneous and oscillatory gamma activity, and their relationship with task performance and cannabis use metrics. Both groups exhibited a significant behavioral flanker interference effect, with slower responses during incongruent relative to congruent trials. Mixed-model ANOVAs indicated significant gamma-frequency neural interference effects in the left frontal eye fields (FEF) and left temporoparietal junction (TPJ). Further, a group-by-condition interaction was detected in the left FEF, with nonusers exhibiting stronger gamma oscillations during incongruent relative to congruent trials and cannabis users showing no difference. In addition, spontaneous gamma activity was sharply suppressed in cannabis users relative to nonusers in the left FEF and TPJ. Finally, spontaneous gamma activity in the left FEF and TPJ was associated with task performance across all participants, and greater cannabis use was associated with weaker spontaneous gamma activity in the left TPJ of the cannabis users. Regular cannabis use was associated with weaker spontaneous gamma in the TPJ and FEF. Further, the degree of use may be proportionally related to the degree of suppression in spontaneous activity in the left TPJ.
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